131660311 has 4 divisors (see below), whose sum is σ = 132349824. Its totient is φ = 130970800.

The previous prime is 131660299. The next prime is 131660339. The reversal of 131660311 is 113066131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131660311 - 2⁵ = 131660279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131660351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344470 + ... + 344851.

It is an arithmetic number, because the mean of its divisors is an integer number (33087456).

Almost surely, 2^131660311 is an apocalyptic number.

131660311 is a deficient number, since it is larger than the sum of its proper divisors (689513).

131660311 is an equidigital number, since it uses as much as digits as its factorization.

131660311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689512.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 131660311 is about 11474.3327039092. The cubic root of 131660311 is about 508.7272003498.

The spelling of 131660311 in words is "one hundred thirty-one million, six hundred sixty thousand, three hundred eleven".